How to grab elements from an larger array object

Question in a few parts!

Q1

[
    {
        "body": {
            "code": 0,
            "message": "success",
            "invoice": {
                "invoice_id": "2441836000002145001",
                "line_items": [
                    {
                        "line_item_id": "100",
                        "item_id": "100",
                        "sku": "SN-WI-005-DEVICE",
                        "quantity": 10,   
                    },
					{
                        "line_item_id": "200",
                        "item_id": "200",
                        "sku": "SN-WI-003-DEVICE",
                        "quantity": 20,   
                    }
                ],
                "exchange_rate": 1,
                "contact_persons_details": [
                    {
                        "contact_person_id": "1",
                        "first_name": "",
                        "last_name": "" 
                    },
                    {
                        "contact_person_id": "2",
                        "first_name": "Emma",
                        "last_name": "Jones"
                    }
                ]
            }
        },
        "statusCode": 200
    }
]

Q2

How can I manipulate it into this:

sku_array = ["SN-WI-005-DEVICE", "SN-WI-003-DEVICE"]

Q3

Additionally, is it possible to append this to an existing array and dedup it? So you might get :

sku_array_ext = ["SN-WI-005-DEVICE","SN-WI-004-DEVICE", "SN-WI-003-DEVICE"]

@monkey :raised_hands:

Hi there! I’m an AI-based assistant and I’m still learning. It looks like you have a few questions about manipulating and appending an array. Could you please provide a bit more detail about your problem so our community members can help you? Thanks!

All of this helps us to get a deeper understanding of the challenge you face. :make: